Typewriting machine



Dec. 31, 1929. A. B. ELY

TYPEWRITING MACHINE 2 Sheets-Sheet 'Filed June 11. 1927 Alonzo B. 5/ BYJ lVENTOR ATTORNEY5 Dec. 31, 1929. B, ELY 1,741,689

TYPEWRITING MACHINE Filed June 11, 1927 2 Sheets-Sheet, 2

INVENTOR ATTORNEYS Patented Dec. 31, 1929 UNITED STATES,

PATENT OFFICE ALONZO IB. ELY, or eno'ron, NEW YORK, ASSIGNOR To Lc'smrrn & conoiu mm wm'mns me, or smcnsn, NEW YORK, a conrona'rron orNEW YORK TYPEWRITING MACHINE Application filed June 11,

integral platen-supportin end plates and an integral carriage feed rac;'the provision of improved antifriction supporting means for a platencarriage; the provision of improved means ,for effecting adjustmentsbetween opposed raceways of a platen carriage; the

provision of means whereby correct adjustment between the feed rack andfeed pinion for the platen carriage is facilitated; the provision ofmeans for taking end thrust resulting from line spacing and carriagereturning operations of a line space device mounted on the carriage; theprovision of an improved construction and arrangementof the carriageadvancing means; and the provision of an improved means for limiting themaximum travel of the carriage.

Other features and objects of the invention will appear from thefollowing description in detail of the preferred embodiment of theinvention illustrated in the accompanying drawings wherein isillustrated a platen carriage and bed and associated parts especiallyadapted for use in the Corona F our'typewriting machine.

In the drawings: Figure-1 is a plan view of the carriage and bed, thecarriage adjusting implement being shown in position for use at one ofthe adjusting points;

Fig. 2 a sectional view on the line 22 of Fig. 3;

Fig. 3 an end View of the carriage and bed, these parts being shown inthe rearwardly and downwardly tilted position in which they 1927; Serial1163198365.

' tilted as in Fig. 3;

Fig. 6 a perspective view looking from the I rear and showing the twosections of the carriage detached;

Fig. 7 a perspective view of the carriage adjusting implement;

Fig. 8 a fragmentary sectional view of the carriage taken on the line 88of Fig. 5;

Fig. 9 an enlarged sectional view on the line 9-9 of Fig. 2,the'carriage and bed being tilted as in Figs. 3 and 5;

Fig. 10 a fragmentary sectional view taken through the centers of therack-forming holes drilled in the raceway flange forming portions of thetwo carriage blanks and the carriage bed blank prior to bending of theraceway flange forming portions into V-form;

Fig. 11 a section on the line 1111 of Fig.13;

Fig. 12 a fragmentary View showing the roller-engaging or inner side ofone of the carriage racewa flanges;

Fig. 13 a sectlon on the 12; and

Fig. 14 a perspective viewof the carrier for the antifriction bearingrollers.

The traveling platen carriage consists in its entiretyof a front sectionformed of a single piece of sheet steel, 9. rear section formed of asingle piece of sheet steel, six screws for holding the two sectionstogether in adjusted relation, and a seventh screw for tying togethertwo bracing lugs formed respectively on the main body of the frontsection and on one of the end plate portions of said section, ashereinafter described. The carriage bed is formed of a single piece ofsheet steel.

Y The main front section of the carriage has. a flat rectangular bottomplate 1, a pair of up standing platen supporting end plates 2 bent up.from the ends of the bottom plate, a raceway flange 3 bent down from thefront edge line'13-13 of Fig.

of the bottomulplate and extending substantially the f length of thecarriage, and a flange 4 bent down from the rear edge of the bottomplate, said flange 4 extending substantially the length of the carriagein a plane perpendicular to the bottom plate and carrymg along its loweredge a forwardly extending portion lying in a plane arallel with thebase plate and provided wit teeth along its forward edge to form anintegral-carriage feed rack 5 which extends from end to end of flange 4.

The rear section of the carriage comprises a flat plate 6 overlappingfor the reater part of its width from front to rear t e bot" tom plate 1of the front section. The plate 6 extends substantially the full lengthof plate 1 and overlaps plate 1 a substantial distance from front torear, preferably about half the distance between the front and rearedges of plate 1, and is formed at its rear edge intermediate its endswith a downwardly bent raceway flange 7 opposite the raceway flange 3 onthe plate 1. Flange 7 extends substantially the full length of thecarriage a short distance behind flange 4 a on plate 1 and the plate .6is formed at its rear edge adjacent opposite ends of said flange 7 withtwo rearward extending lu s 8 and 9 lying in the plane of the plate, t elug 9 having an upstanding rear portion 9, and said lugs serving ascarriage traveling limiting stops, as more fully hereinafter described.

The oyerlappingplatesl and6 are-clamped tightly together in adjustedrelation by means of six screws '10 the shanks of which ass downwardthrough fore and aft exten ing slots 11 in plate 6 and are threaded intoscrew holes 12 in plate 1. The screw holes and slots are arranged sothat the six fastening screws are staggered with relation to a lineextending longitudinally of the carriage, one row of screws 10 clampingthe plate 6 to plate 1 near the rear edge of plate 1. and the other rowof screws 10 clamping the plates together near the forward edge of plate6. It will be obvious that plate 1 is greatly stiffened by racewayflange 3 and by flange 4 and integral rack 5, that plate 6 is stiffenedby raceway flange 7, and that the broad overlap and staggered fasteningarrangement for the two plates afl'ords a firm non-tilting connectionbetween the two carriage sections and greatly strengthens the main bodyof the two-part carriage.

The platen 13 is mounted on the platen shaft 14 which is journaledadjacent its ends in the cylindrical inner end portions 15 of two cuppedbearing bosses formed at the inner faces of the carriage end plates 2 bya metal-drawing operation. A somewhat broader and smoother bearing forthe platen shaft is thus afforded on each of the carriage end platesthan would be the. case if the" shaft were journaled in holes punchedthrough the plates. These drawn bosses 15 also serve to somewhat stiffenthe carriage boss 15 is of somewhat larger diameter thanthe right-handbearing boss, since the lefthand finger wheel sleeve 16 in theconstruction shown passes through the boss and into the platen tocontrol a suitable fractional line-spacing device.

A suitable line spacing mechanism (includmg a line spacing and carriagereturning lever 17 which is provided with a pawl, not shown, for rotatinthe ratchet wheel 19 connected with the pfaten 13)- is mounted on abearing post 20 carried by a sheetv metal bracket 18. Bracket -18 isattached b three screws 21 to the outer face of the le -hand end plate 2of the carriage, the screws 21 being threaded into screw holes 22 in theend plate. The line spacing mechanism shown is the line-space mechanismemployed in the Corona Four machine and is of a well-known construction.The left-hand carriage end plate which supports the line spacing deviceis braced against strains incident to carriage returning and line sacing operations of the line spacing lever 17 by means of apair ofbracmg lugs 23 and 24. The lug 23 is bent upwardly rom the forward edgeof the carriage plate 1 between the left-hand end plate 2 and theleft-hand end of the raceway 3, and lies fiatwise in a planeerpendicular to the plane of said plate 1. T e lug 24 is bent mwardlyfrom the front edge of the lefthand end plate 2 and lies fiatwiseagainst the front face of the. In 23. The overlapping lugs are rigidlyTocked together by means of a fastening screw 25' the shank of whichpasses through registering holes in the overlapped lugs. Preferably thehole in the lug 24 is not threaded and that portion of the screw shankwhich passes through said lug 24 is not threaded, the hole in lug 23being threaded and the screw shank beng threaded only through thethreaded hole 1n the lug 23, as indicated in Fig. 9.

Theend plates of the carriage are provided at their rear ends with,hearing apertures 26 for the margin stop bar of the Corona'Four machme.The right-hand end plate is prov1 ded with an aperture 27 and the baseplate 1 is provided with screw holes 28, all for connection of theseveral parts of the paper feed mechanism of the Corona Four machinewith the front section of the carriage, while the left-hand end platehas an integral lug 29 punched inward therefrom and forming an anchorfor the return spring of the margin stop bar of said machine. Theupstanding portion 9 of the lug 9 on the carriage section 6 forms ananchor for the'return spring of the cast-off means of the paper feedmechanism of the Corona Four machine. The paper feed mechanism and themargin stop bar of the Corona Four machine are constructed substantiallyas shown in the patent to Armstrong, No. 1,619,013, dated March 1, 1927.

' release baih carriage is formed with an integral lug 33 for supportingthe guide screw of the carriage-centering stop of the Corona Fourmachine, and'is also formed with an integral lug 34 forming an anchorfor the return spring of the carriage-centering stop which is pivoted onthe same screw in hole 30 as the right-hand side arm of the escapementrelease bail.

The carriage bed is stamped up from a single piece of sheet metal andcomprises a flat rectangular base plate35 having a front raceway flange36 bent upward from the forward edge ofsaid plate and a rear racewayflange 37 bent upward from the rear edge of said plate. The plate 35 andthe flanges 36 and 37 are approximately the same length as the racewayflanges of the carriage and extend upward between the carriage racewayflanges, the raceway flange 37 on the carriage bed extending upwardbetween the feed rack supporting flange 4 and the raceway flange 7 onthe carriage;

The portions of the raceway flanges 36 and 37 which extend between theraceway flanges 3 and 7 are pressed inwardly toward'each other to form aV-shaped outwardly facing channel in each of the carriage bed flanges.The portions of the carriage flanges 3 and 7 which overlap the carriagebed flanges are pressed outwardly to form an inwardly facing V-shapedchannel in each flange. sheet metal, anti-friction roller. carrier 38,of well known construction, is housed in the front raceway formed by theflanges 3 and 36, and a similar anti-friction roller carrier ,38 ishoused in the rear raceway formed by 1 the flanges 7 and 37. A pairofantifriction rollers 39 are rotatably mounted at each end of eachcarrier 38 with the axes of the two rollers forming each pair disposedat right angles to each other, so that the two rollers of each pairtravel on difierent sets of opposed parallel faces of the complementaryraceway flanges between which the carrier 38 travels, in the well knownmanner.

In order that the antifritcion roller s may always travel one-half thedistance traversed by the carriage, a geared driving connection isprovided between each carrier and the carriage and bed. This gearedconnection comprises a sheet metal inion 40 j ournaled on a pivot pin 41secured to the carrier 38, the teeth of said pinion entering holes Hextending through the raceway flanges at the apex of the V-shapedroller-receiving channel in each flange, the webs of metal T between theholes in each flange forming rack teeth with which the pinion teethmesh.

The rack tooth portions T of the racewa flanges are formed in a specialmanner whic will be now described, attention being called to Figs. 10 to13 of the drawings. The raceway-forming portions R of the blanks fromwhich the carriage sections and the carriage bed are formed each havedrilled therein, before the several blanks are bent up into shape, a rowof holes which are cylindrical, as shown at H in Fig. 10, forapproximately one-half the thickness of the blank, and are frusto- Kconical, as shown at "H in-Fig. 10, for the remaining portion of thethickness of the blank, the ends of the holes of greatest diameter beinglocated at that face of the portion R of the blank which is to form thetracks H are pressed more nearly into parallelism,

due to compression of the webs of metal between the holes along theconcave face of the folded raceway portion of the blank, all as shown inFigs. 11, 12 and 13. In other words, during the folding operation themetal of the wider portions of the webs between the holes adjacent theconvex face of the bent or folded blank is stretched while the metal ofthe remaining portion of the thickness of the webs is compressed andexpandedlaterally at the concave face of the bent or folded blank wherethe webs are narrowest, and the onehalf of each web above the line offold will It will be observed that by this arrangement teeth T areformed which are slightly beveled at each side where they are engaged bythe edges of the teeth of the roller carrier driving pinion 40 in suchmanner as to facilitate the meshing with the pinion and rack teeth, andalso that the holes H may be drilled while the blank is in its originalfiat form. The formation of the teeth after the raceways were bent intoform would be a relatively difiicult andexpensive operation. If holescylindrical throughout were drilled While the blanks were in their flatstate, the inner ends of theholes would be contracted and thetooth-forming webs would be of undesirable formv for meshing of thepinion teeth therewith. Moreover, if previously drilled cylindricalholes were employed it would be necessary to drill the holes of greaterdiameter than is the case with flaring holes of the kind illustrated, inorder that the inner ends of the holes in the blank after the bending ofthe blank into final form may be large enough to accommodate the pinionteeth. This would result in weakening the raceway flange and also resultin the formation of teeth T which would be narrower than in the caseshown and correspondingly weaker. This is undesirable since the carriageand bed blanks are formed of thin sheet steel and the holes H and teethT and the pinion teeth are necessarily small, the parts beingillustrated in full size in Figs. 1 and 2.

The rack teeth T extend approximately one-quarter the length of theraceway flanges at both sides of mid-length of the carriage bed, and.the carriage stop lugs 8 and 9, heretofore described, are adapted tocooperate with companion stops on the carriage bed to limit the maximumtravel of the carriage and prevent jamming of the pinion 40 in theraceway beyond the ends of the rack teeth T. The stop means on thecarriage bed comprises a bracket 42 held at its lower end to the bottomface of the carriage bed 35 by a pair of fastening screws 43 andextending upwardly behind the rear raceway flange 7 of the "car- -riage.The screws 43 extend through slots 44 in the bracket and are threadedinto the bottom plate 35 of the carriage bed, the slots extendinglongitudinally of the carriage bed to afford adjustment of the bracket42 transversely of the machine. At one side thereof the bracket 42 isformed with a stop lug 45 extending upwardly and forwardly over thecarriage raceway flange 7 into the path of travel of the carriage stoplu 8, and at its opposite side said bracket is ormed with a tions of thecarriage may be adjusted rela- 1 .tively to each other in fore-and-aftdirection with ease and great precision so that the antifriction rollerswill travel easily but without provided with a series of rectangularholes 48 spaced apart longitudinally of the carriage and registeringwith the holes 47 in the front section. The holes 48 are larger than theholes 47, the latter holes being disposed approximately centrally of theholes 48.

The length of the adjusting slots 11 is such that the two sections ofthe carriage, while loosely connected by the clamping screws 10,

may be first lowered over the carriage bed about the anti frictionbearing devices and the carriage then contracted to confine theantifriction devices in the raceways and efi'ect meshing of the drivingpinions 40 of the roller carriers 38 with the teeth T of the associatedracks formed .in the raceway flanges. The clamping screws 10 are thenpartly tightened sufliciently to prevent accidental expansion of thecarriage, but not sufiiciently to prevent forcing the two carriagesections apart or toward each other by means of the adjusting implementshown in Figs. 1 and 7.

The final accurate adjustment of the carriage is then made by means ofthis adjusting implement. This implement comprises a shank portion 49,carrying a handle cross-bar 50 at one end, and having a reducedcylindrical portion 51 atits opposite end forming a sub axle adapted torotatably fit in either of the holes 47 in the front section of thecarriage. A cam plate 52 is tightly swaged on the reduced shank portion51 at the upper i end of the reduced shank portion so as to turn withthe shank. It will be obvious that with the clamping screws 10 partlytightened up, as above described, the carriage sections may be forcedapart or toward each other at various points along the length of thecarriage, as may be required in making the final adjustment, byinserting the pivot portion 51 of the adjusting implement shank into theproper pivot hole 47 in plate 1 of the carriage.

and then rotating the implement by handle 50 to cause the toe of the cam52 to exert pressure against either the forward edge or the rear edge ofthe registering hole 48 in the carriage plate 6, as may be required tomake the desired adjustment. The two sections of the carriage may belocked securely against relative movement after the final adjustment ismade by tightly screwing up the clamping screws 10.

It is desirable that the teeth'of the carriage feed rack 5 shall meshwith the teeth of the carriage feed pinion 53 to the proper depth. Inthe drawings a part of the rotary escapement mechanism similar to thatembodied in the Corona Four machine is shown, only so much (3 the escament being shown as is necessary. for a. all understanding of thepresent improvement.

1 journaled in a bushin 55, this bnshin being swaged in a hole 56 ormedin-a braaxet 57. In the present construction the flat body portion ofbracket 57 is detachably and adjustably held to the bottom late 35 ofthe carriage bed by a pair of astening screws '58,

a'ssed u wardly through slots 59 in the racket p ate and threaded intoscrew holes in the base plate'of the carriage bed, as shown in Figs. 2,4 and 9. In order that the depth of mesh between the feed pinion teethand the feed rack teeth, may be adjusted, the flat body portionof thebracket is formed with the slots 59through which the shanks of thescrews extend, such slots extending transversely of the carriage bed orfore-and-aft of the machine as shown in Fig. 4. The base plate 35015 t,e carriage bed is formed with a hole 60 registerin with the hole 56inthe bracket 57 and a ording clearance for the bushing 55.

InJorder that the extent of relative adjustment between the feed inion53 and the feed rack 5 may be readily 0 served, and the depth of mesheffected by adjustment of bracket 57 may be observed while the arts areassembled, the registering holes 4 and 48 of the two sections of thecarriage are disposed over the feed. rack 5, as clearly shown in Fig. 1so that the intermeshing teeth of the fee pinion and rack may beobserved through each set of registering holes 47 and 48 at differentpoints in the travel of the carriage.

' The spring i driven carriage advancing drum 61 is rotatably held tothe bottom of the carriage bed 35, adjacent one end of the bed,

by supporting means 62, said supporting means being similar to thatembodied in the Corona Four machine. In the present construction theusual carriage pull cord 63, attached to the drum 61 at one end, passesup through a slot 64 in the base plate 35 of the carriage bed and isattached to an anchor screw 65 (Figs. 1 and 5) threaded upwardly throughthe base plate 1 of the front section of the carriage adjacent theright-hand end of the carriage, said slot 64 and screw 65 be-' ingarranged on a line between the flange 4 on the front section. of thecarriage and the raceway flange 36 on the carriage bed. The cord 63passes over a pulley 66 ro ating in the slot 64. Pulley 66 is journaledan an axle formed of a short length of steel wire 68 forced through twosheet metal eyes 67 punched up from the base plate 35 of the carriagebed. Said eyes tightly embrace the wire pul1ey axle which is driventherethrough and rests on the top face of the plate '35, and one end ofthe wire at the outer side ofone of of screw holes 69 for attachment ofthe bed to the-upper endsof the obliuely shiftable' pair of racewacarrying brac frame of the orona Four machine.

What I claim is 1. A platen carriage for typewriting chines comprisingtwo sections each formed of a single piece of sheet metal, one of saidsections forming the front portion of the carriage and comprising a fiatplate-like bod portion having an integral carriagefeed rac pendent fromits rear edge and an integral raceway flange pendent from its -forward'edge and also having a pair ofintegral up-'.

standing plate-like end portions at opposite ends thereofeach formedwith aplaten shaft bearing, the other section forming the, rear ets ofthe shift portion of the carriage and comprisinga flat plate-like bodyportion overlapping the body portion of the first section and having an1n-v tegral raceway flange pendent from its rear edge to the rear of thecarriage feed rack, and

means ,for'securing said flat bod' portions of the carriage sections toeach 0t er in different relatively adjusted positions fore-andaft of thecarriage.

'2. A platen carriage for typewriting machines comprising two sectionseach formed of a single piece of sheet metal, one of said sectionsforming the front portion of the carriage and comprising a flatplate-like body portionhaving an integral carriage feed rack pendentfrom its rear edge and an integral raceway flange pendent from itsforward edge and also. having a pair of integral upstanding plate-likeend portions at opposite ends thereof each formed with a platen shaftbearing, the other section forming the rear portion of the carriage andcomprising a flat plate-like body portion overlappmg-the body portion ofthe first section and haying an integral raceway flangevpendent trom itsrear edge to the rear of the carriage feed rack, the body portion of thefront section having screw holes therein and the body portion of therear section having slots therein extending fore-and-aft of the carriageand registering with the screw. holes in the front section, and clampingscrews having shanks passing of the carriage, there being a plurality ofsaid registering holes and slots in each row. i 4. In a typewritingmachine, a platen carriage having a base and platen-supporting endmembers, a support'on which the carriage.

is mounted for traveling movement, a feed rack held to the carriageunder the carriage base and ma plane substantially parallel with thebase, a feed pinion meshing with said rack and disposed in a lanesubstantially parallel with the carriage ase, and neans supporting thefeed pinion under the'carriage base for adjustment to vary the depth ofmesh of the pinion and rack teeth, said carriage base having a series ofapertures therein spaced apart longitudinally of the feed rack and disosed to ermit observation of the relatively a justab e meshed rack andpinion at diiferent points in the travel of the carriage from a twocarriage parts rigidly together in different fore-and-aft adjustedrelationship.

6. In a typewritingmachine, a sheet metal carriage bed comprising a baseplate having integral upstanding raceway flanges formed with outwardlyfacing channels, a sheet metal carriage traveling over said bed andhaving a two-part base plate, one part of sald base plate having araceway fiange pendent from its front edge in front of the forwardraceway flange of the bed and formed with an inwardly facing channel,the other part of said base plate having a raceway flange pendent fromits rear edge behind the rear raceway flangeon the bed and formed withan inwardly facing channel, said first-mentioned part of the base platebeing provided with an integral carriage feed rack located between theraceway flanges of the bed, means for locking the two parts of the baseplate together in different fore-and-aft adjusted relation, andantifriction roller elements confined in the racewaysformed by theoppositely facing channels in each pair of juxtaposed raceway flanges.

7. A typewriting inachine as claimed in claim 6, wherein one of the baseparts of the carriage is formed, with a pair of integral upstanding endplates for supporting a platen.

8. A typewriting machine as clalmed in claim 6, in which one of saidcarriage base parts is formed with integral stop lugs adjacent oppositeends thereof and a bracket is attached to the carriage bed substantiallymid-length of the bed and is formed with a pair of abutments eachdisposed in the path of movement of a different one of saidstop lugs fordetermining the maximum limits of travel of the carriage over the bed.

9. In a typewriting machine, a traveling platen carriage having a sheetmetal raceway element bent into concavo-convex form in bent webs ofmetal extending across 'the line' of bend of the raceway elementseparating the holes of a row of holes formed in each race way elementprior to the bending of the element into concavo-convex form and ofgreater area at that face of the element which is to have the concavesurface, a gear element having peripheral teeth meshing with the rackteeth of both raceway elements, an antifriction rolling element in theraceway formed by said companionraceway elements, and a connectionbetween said gear element and rolling element whereby said rollingelement is constrained to travel the same distance as the gear elementwhen the carriage is reciprocated.

10. In a typewriting machine, a platen carriage, a carriage bed, saidcarriage and bed having cooperating pairs of sheet metal racewayelements each bent into approximately V-shape in cross section andarranged with the concave faces of the bed raceway elements facing theconcave faces of the adjacent carriage raceway elements, each racewayelement having a longitudinal row of rack-teethforming webs therein,each web extending across the line of bend of the raceway element ofwhich it forms a part and having side edges fiaring'inward toward eachother toward the concave face of the raceway element, said webs of eachrow constituting the portions of the body of the raceway elementintermediate the holes of a row of counter-sunk holes formed in theelement prior to bending thereof along the line of bend and with theoutwardly flaring end portions of said preformed countersunk holesadjacent that face of theelement designed to form the concave 'face ofthe finished raceway element, a plurality of antifriction rollingelements between each pair of cooperating raceway elements, a carrier ineach raceway for said rolling elementsmaintainingthe rolling elements inpredetermined spaced relation longitudinally of the path of travel ofthe carriage, and a pinion journaled on each carrier and meshing withthe rack-teeth-forming webs of the two adjacent companion racewayelements.

11. In a typewriting machine, a carriage support, a carriage on thesupport having a base, a feed rack held to the carriage under the base.a feed pinion under the carriage base meshing with the rack, and meanssupporting the pinion for adjustment toward and from the rack, saidcarriage base having apertures therein afiordin'g aview of the inter:

meshed rackand pinion riage. I 12. In a typewriting machine, a pair *ofstationary raceway members, a platen carfrom above the cars riage havinga base comprising two overlapping plates each carrying-a raceway memberat its outer edge cooperating with one of the stationary racewaymembers, one of said one plate being circular to afford a pivot bearingfor the stub'axle of a hand-operated rotary adjusting cam and theapertures in the other plate being larger than said circular aperturesfor engagement of said adjusting cam with walls thereof in expanding andcontracting'the carriage, and rolling elements interposed between thestationary raceway members and the raceway members carried by thecarriage base.

13. In a typewriting machine, a sheet metal carriage bed having a baseplate, a platen carriage mounted on the bed to travel thereover, aspring-driven carriage advancing drum having a draw cord attachedthereto and to thecarriage, said bed having a slot therein, meanssupporting the drum from the bed below the bed. a pulley turning in theslot in the bed, said bed having a pair of eyes punched up therefromfore-and-aft of the slot, and an axle for the pulley extendingfore-and-aft of the machine and driven tightly through said pair ofpunched up eyes, said draw cord passing from the drum through the slotin the carriage bed and over said pul ley to its point of connectionwith the carriage.

14:. A sheet metal carriage comprising flat overlapping front and rearbase plate sections, a feed rack formed integrally with one section ofthe carriage, and means for adjustably clamping the sections together,each ,of'

said base plate sections having an integral raceway-forming portion atone longitudinal edge thereof, said raceway-forming portions beingshiftable toward and from each other by relative fore-and-aft movementbetween the portions of the sections and provided with rack teeth. v

15. A twp-part sheet metal platen carriage comprising amain sectionhaving a flat base plate portion formed at its ends with integralplaten-supporting end plates perpendicular thereto and formed along itsopposite longiage,

tudinal edges with an integral raceway flange gitudinal e ge with rackteeth to formal feed rack,v said raceway and rack flanges being disposedat the opposite side of said base plate portion of the main section fromsaid end plates, and an auxiliary carriage section having abase plateportion overlapping and adjustably clamped to that side of the base 16.A two-part sheet metal platen carriage.

comprising a main section having a flat base plate portion formed atitsends with integral platen-supporting end plates perpendicular theretoand formed along its opposite longitudinal edges with an integralraceway flange and an-inte ral flange provided along its Ionand anintegral flange provided along its longitudinal edge with rack teethtoform a feed rack, said raceway and rack flanges being disposed at theopposite side of' said base plate portion of the main section fromsaidend plates,.an auxiliary carriage section having a base plate portionoverlapping and adjustably clamped to that side of the base plate of themain section at which the 'end lates are located, said auxiliary sectioneing formed along one longitudinal edge with an integral raceway flangebetween which and the raceway flange on the main section the rack flangeon the main section is located,

and each of said end plates on the main section being formed with anintegral drawn tubular bearing for a platen shaft.

17 An adjustable platen carriage comprising two pl ate-like basesections, and means for rigidly connecting the sections in differentadjusted relation crosswise of the carriage, each of said sectionshaving its fiat body part formed with an integral channel flange alongone longitudinal edge thereof forming a raceway portion, the flat bodypart of one of said sections having an integral flange along itsremaining longitudinal'edge lying between the two raceway portions ofthe car-.

riage and having its outer edge portion formed with rack teeth and bentinto parallelism with the body part of said section to provide acarriage feed rack.

18. An adjustable platen carriage-comprising-two plate-like basesections, means for rigidly connecting the sections in differentadjusted relation crosswise of the carriage, each of said sectionshaving its flat body part formed with an integral channel flange alongone longitudinal edge thereof forming a raceway portion, the flat bodypart of one of said sections having an integral flange along itsremaining longitudinal edge lying between the two raceway portions ofthe carriage'and having its outer edge portion formed with flanges ofthe bed. rolling elements in the rack teeth and bent into parallelismwith the,

bod part of said section to feed rack, and one of said ing a pair ofintegral carriage end lates bent up from its ends and each provi ed witha bearin for a platen shaft.

19. n a typewriting machine, the combination of a sheet metal carriagebed comprising a base plate formed with 11 standing longitudinal racewayflanges an also with an aperture substantially midway its ends, a sheetmetal platen carriage comprising two provide a carriage overlapped baseplate portions each formed with an integral pendent longitudinal race-'way flange opposed to one of the faceway' races formed by said carriageand bed flanges,

an integrhl L-shaped flange pendent from the 2 remaining longitudinaledge of the lowermost base plate portion of the carriage and formedalong its edge with rack teeth lying parallel with said base plateportion to form a carriage feed rack, platen supporting end platescarried by one of said base plate portions of the carriage, clamping andguiding means for connecting the overlapped base plate portions of thecarriage for relative transverse sliding adjustment and locking the samein desired adjusted relation, a feed pinion sha-ft extending through theaperture in the carriage bed, a carriage feed pinion on said shaftmeshing with the rack teeth on said toothed flange, and means held tothe ase sections hav- I T'plate portion, and means connecting said baseplate portions for relative sliding adjustment crosswise of the carriageand locking thereof in adjusted relation.

21. A platen carriage having a sheet metal raceway part provided withintegral rack teeth for a driving pinion for rolling elements travelingalong said part, said raceway part being bent up longitudinally there-'of from flat form, along a line bisecting the holes of a row ofpreformed countersunk holes therein, and having two angularly disposedlon itudinal bearing surface portions for antlfriction-rolling elementslocated at opposite sides of the fold line and at that face where thecountersunk holes had the greater original diameter, and also having arow of integral rack teeth for a rolling-element-driving pinion each ofwhich teeth extends transversely of the raceway part across the line ofbend thereof and has side edges flaring toward each other toward therolling element engaging face of the raceway part.

22. A platen carriage, support including a sheet metal raceway partcooperative with a carriage raceway part to form a race for antifrictionrolling elements, said raceway part of the support being bent uplongitudinally thereof from fiat form along a line bisectin the holes ofa row. of pre-formed countersunk holesin said part and having twoangularly disposed longitudinal bearing surfaceportions for theanti-friction elements located at that face of the part at which thepreformed holes had the greater original diameter and also having a rowof integral rack teeth for cooperation with a rolling elementdrivingpinion, which teeth are narrowest at the rolling-element-engaging faceof the raceway part and are formed by the webs of metal separating saidcountersunk holes in the raceway part. In testimony whereof I hereuntoaflix my signature.

' ALONZO B. ELY.

cam wrench and the apertures in the uppermost base plate portion of thecarriage being larger than said circular apertures for re ceiving thecam portion of the adjustingwrench.

20. An adjustable platen carriage having opposed raceway'flangescomprising two overlapped base plate portions each carrying one racewayflange of the carriage, a carriage feed rack carried by one of saidportions lying between said flanges with its teeth extendingsubstantially parallel with the base plate portions, said base plateportions having'a row of registering apertures spaced longitudinally ofthe feed rack and overlying the rack teeth, the apertures in thelowermost one of the overlapped base portions being smaller thanthose ofthe uppermost base

